GPT-5.1 vs Mi:dm K 2.5 Pro
OpenAI vs Korea Telecom — benchmarks, pricing, and capabilities side by side.
- •GPT-5.1 has the higher intelligence index (89 vs 74.4)
- •Mi:dm K 2.5 Pro is cheaper ($0.00 vs $1.25 per 1M input)
| GPT-5.1 | Mi:dm K 2.5 Pro | |
|---|---|---|
| Intelligence index | 89 | 74.4 |
| Developer | OpenAI | Korea Telecom |
| Type | LLM | LLM |
| Access | API only | — |
| Context window | 400,000 tokens | — |
| Input price | $1.25 / 1M | $0.00 / 1M |
| Output price | $10.00 / 1M | $0.00 / 1M |
| Speed | 115 tok/s | — |
| Released | November 12, 2025 | December 11, 2025 |
| Parameters | — | — |
| Input modalities | Text, Image | — |
| Output modalities | Text | — |
Shared benchmarks
GPT-5.1
Mi:dm K 2.5 Pro
AIME 2025
94
78.7
GPQA Diamond
88.1
72.2
Humanity’s Last Exam
26.5
8.8
LiveCodeBench
86.8
65.6
MMLU-Pro
87
81.3